Following is the response from the server space provider, I have got upon requesting 1GB mail box size for each e-mail id for the website hosted in shared environment.
Please note that in the normal shared hosting environment, you will be facing the following issues if you are allocated with more email space:
Generally domains that have more number of Email id's and email space have lot of mails stacked in the server which creates spike in inode creation in the server . This in turn creates file system errors affecting the disk integrity.
Note that since you are in a shared hosting environment , the CPU usage per domain is 12 to 15 % only. If lot of mails is stacked in the server, the mail server CPU usage for your domain will go high and it will affect the performance of the entire server
Hence in order to maintain the highest level of performance on our shared servers, we are limiting the mail box maximum size to 100MB only.
How appropriate are these technical reasons?
Is there any way they can provide 1GB mail box and simultaneously keep constraints or check on other factors and avoid above mentioned problems?